You got a misconception there. The structure blueprint will not change at all. It’s always going to use ElectricGenerator. The GeneratorEmitter is a Emitter blueprint. It’s added to the ElectricGenerator blueprint as a child actor component. The only thing it does in the case of the generator is playing the constant sound you hear when you turn the generator on. You shouldn’t need to mess with this blueprint at all. Everything goes on the ElectricGenerator blueprint.